# Probability

Probability
Probability is simply how likely something is to happen
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Slide 1: Tekstslide
MathematicsLower Secondary (Key Stage 3)

In deze les zitten 23 slides, met interactieve quizzen en tekstslides.

## Onderdelen in deze les

Probability
Probability is simply how likely something is to happen

#### Slide 1 -Tekstslide

How many words can you
find relating to probability

If you got:
1-4
5-8
9-12
13+

you are:
Good
Ace
Awesome
Superstar

#### Slide 3 -Tekstslide

Probability is simply how likely something is to happen

#### Slide 4 -Tekstslide

Where would you place these words on the probability line
Likely Certain Impossible Unlikely  Evens

#### Slide 5 -Tekstslide

Where would you place these percentages on the probability line
100%chance, 75%chance  50%chance, 25%chance, 0% chance.

#### Slide 6 -Tekstslide

How can we be more accurate when talking about probability?​
We express probability as a number between 0 and 1.​​
The probability for an event which is IMPOSSIBLE is 0.​
The probability for an event which is CERTAIN is 1.​​
Probability can be expressed as a fraction, a decimal or a percentage.​

#### Slide 7 -Tekstslide

Think - Pair - Share
Use the words to describe the probabilities of these events
1. You will celebrate your 10th birthday tomorrow.
2. It will rain tomorrow.
3. Everyone will be on time for class.
4. The next person to pass you in the corridor is a female.
5. You will stay up late tonight playing on a computer.
6. You have checked your social media this morning before you got out of bed.
7. The sun will rise tomorrow.
8. It will snow on Christmas day.
9. You will win the lottery on Saturday night.
10. Morocco will win the football world cup

#### Slide 8 -Tekstslide

To calculate the probability, when all possible outcomes are equally likely we can use the following formula
Probability = number of ways an outcome can happen
divided by the total number of outcomes

For example I have a bag with   2 pieces of fruit in it
I pear and 1 apple what are the chances of me picking the pear
1pear divided by 2 pieces of fruit is
1/2 or 50%

#### Slide 9 -Tekstslide

What is the probability of snow falling in the month of May in Northern Ireland
A
Impossible
B
Very unlikely
C
Certain
D
Evens

#### Slide 10 -Quizvraag

There are 40 cubes in a bag.
Two of them are yellow.​
What is the probability of picking,
at random, a yellow cube?
A
1/40
B
2/40
C
2/38
D
1/2

#### Slide 11 -Quizvraag

This dice has eight sides.​
What is the probability of the
4 landing uppermost?​
A
1/16
B
4/8
C
1/8
D
2/8

#### Slide 12 -Quizvraag

A pack of 52 cards is shuffled.​
What is the probability of
selecting, at random,
A
1/13
B
4/52
C
1/52
D
1/4

#### Slide 13 -Quizvraag

Two coins are tossed.​
What is the probability of
them landing both tails?​
A
1/4
B
2/4
C
1/3
D
4/4

#### Slide 14 -Quizvraag

A pack of 52 cards is shuffled.​
What is the probability of
selecting, at random,
any ace of ?
A
4/13
B
4/52
C
1/52
D
1/4

#### Slide 15 -Quizvraag

When throwing two dice,
what is the probability
of scoring a double six?
A
1/36
B
1/12
C
2/36
D
2/12

#### Slide 16 -Quizvraag

There are 200 straws in this
packet, coloured pink, orange,
green and yellow. What is the
probability of picking at random
a blue one?
A
0
B
1/200
C
1/4
D
1/100

#### Slide 17 -Quizvraag

There are 200 straws in this
packet, coloured pink, orange,
green and yellow. What is the
probability of picking at random
a red one?
A
0.1
B
0.2
C
0.25
D
0

#### Slide 18 -Quizvraag

This bingo machine has 90 balls,
from 1 – 90.​What is the probability
of the number on a ball ending
in zero?
A
0.0
B
1/90
C
1/9
D
10%

#### Slide 19 -Quizvraag

The probability of it
landing on a one is 0.8​
What is the probability of it
not landing on a one?
A
5/6
B
1/6
C
0.4
D
0.2

#### Slide 20 -Quizvraag

Sean makes a fair
6 sided spinner
what is the chance
that the spinner land on a 3
A
O.1
B
0.3
C
0.5
D
0.6

#### Slide 21 -Quizvraag

Sean has a box of pens. The box contains 6 blue pens,
8 black pens and 3 red pens.
What is the probability that he will pick a blue pen?
A
1/17
B
6/8
C
6/11
D
6/17

#### Slide 22 -Quizvraag

Some more blue pens are added to the box.
The probability of selecting a blue pen is now ½
How many blue pens were added to the box?
A
7
B
5
C
11
D
2